In what possible universe is Google transparent about privacy?? Can you go somewhere to see what data they have collected about you? I think not.

You have literally no idea what data they have in the no doubt comprehensive profile they have built about you based on search and gmail. If you read their privacy terms there are an alarming number of "outs" for them to basically use that information however the hell they want. Add to that their creepy wifi data collection, creepy streetview cars, etc etc. Hell, a Google search is a pretty good record of your thoughts.

I consider Google one of the biggest threats to privacy going around. By comparison Facebook is child's play.